Start button for construction machinery



FIG. 1 is a perspective view of a start button for construction machinery showing the new design:

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right -side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM The ornamental design for a start button for construction machinery, as shown and described herein. 